Share-Based Employee Compensation - Share-Based Compensation Including Expense for Phantom Stock Units and Cash Settled Stock Appreciation Rights Granted to Employees (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Dec. 31, 2013
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Long-term incentive compensation and other	$ 2,759		$ 5,555
Cost of employee share-based compensation included in income, before income tax	5,335	1,319
Cost of sales
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Cost of employee share-based compensation included in income, before income tax	309	80
Operating expenses
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Cost of employee share-based compensation included in income, before income tax	5,026	1,239
Phantom Stock Units
Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Line Items]
Long-term incentive compensation and other			1,391
Cost of employee share-based compensation included in income, before income tax	$ 572	$ 265